<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRouleDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList" stripe border>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addRouleDialogVisible"
      width="30%"
      @close="addDialogClosed"
    >
      <el-form
        :model="addRoleFrom"
        :rules="addRoleFromRules"
        ref="addRoleFromRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleFrom.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleFrom.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRouleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑角色对话框 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editRouleDialogVisible"
      width="30%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editRoleFrom"
        :rules="editRoleFromRules"
        ref="editRoleFromRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRoleFrom.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRoleFrom.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRouleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="36%"
      @close="setRightsDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        ref="treeRef"
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        :default-expand-all="true"
        :default-checked-keys="defKeys"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button 
        type="primary" 
        @click="allotRights"
        >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data() {
    return {
      // 保存的角色数据列表
      rolesList: [],
      // 添加角色对话框是否显示
      addRouleDialogVisible: false,
      // 编辑角色对话框是否显示
      editRouleDialogVisible: false,
      // 分配权限对话框是否显示
      setRightDialogVisible: false,
      // 添加角色表单数据
      addRoleFrom: {
        roleName: '',
        roleDesc: '',
      },
      // 编辑角色表单数据
      editRoleFrom: {},
      // 添加角色表单验证规则
      addRoleFromRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '角色名称的长度在2~10个字符之间',
            trigger: 'blur',
          },
        ],
        roleDesc: [{ required: false }],
      },
      //  编辑角色表单验证规则
      editRoleFromRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '角色名称的长度在2~10个字符之间',
            trigger: 'blur',
          },
        ],
        roleDesc: [{ required: false }],
      },
      // 所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName',
      },
      // 权限数据
      defKeys: [],
      // 即将分配权限的角色id
      roleId:''
    }
  },
  created() {
    // 加载角色列表
    this.getRolesList()
  },
  methods: {
    // 刷新角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200)
        return this.$message.error(
          '获取角色列表失败，状态码为：' + res.meta.status
        )
      this.rolesList = res.data
    },
    // 添加角色确认按钮
    addRole() {
      // 对表单进行预约证
      this.$refs.addRoleFromRef.validate(async (valid) => {
        if (!valid) return this.$message.error('错误的格式，添加角色失败！')
        const { data: res } = await this.$http.post('roles', this.addRoleFrom)
        if (res.meta.status !== 201)
          return this.$message.error(
            '添加角色失败，状态码为：' + res.meta.status
          )
        // 关闭对话框
        this.addRouleDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 弹框提示
        this.$message.success('添加角色成功！')
      })
    },
    // 监听添加对话框关闭事件
    addDialogClosed() {
      this.$refs.addRoleFromRef.resetFields()
    },
    // 监听编辑对话框关闭事件
    editDialogClosed() {
      this.$refs.editRoleFromRef.clearValidate()
    },
    // 展示编辑用户对话框并查询该用户信息并存储
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error(
          '查询用户信息失败，状态码为：' + res.meta.status
        )
      }
      this.editRoleFrom = res.data
      this.editRouleDialogVisible = true
    },
    //编辑用户确定按钮
    editRole() {
      this.$refs.editRoleFromRef.validate(async (valid) => {
        if (!valid) return this.$message.error('错误的格式，修改角色信息失败！')
        const { data: res } = await this.$http.put(
          'roles/' + this.editRoleFrom.roleId,
          {
            roleName: this.editRoleFrom.roleName,
            roleDesc: this.editRoleFrom.roleDesc,
          }
        )
        if (res.meta.status !== 200)
          return this.$message.error(
            '修改角色信息失败，状态码为：' + res.meta.status
          )
        // 关闭对话框
        this.editRouleDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 弹框提示
        this.$message.success('修改角色信息成功！')
      })
    },
    // 根据id删除对应的角色
    async removeRoleById(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)

      // 如果用户确定删除，则返回字符串 confirm
      // 如果用户取消了删除，则返回字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200)
        return this.$message.error('删除角色失败，状态码为：' + res.meta.status)
      // 刷新角色列表
      this.getRolesList()
      // 提示删除角色信息成功
      this.$message.success('删除角色成功！')
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否确定删除权限
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除！')
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200)
        return this.$message.error('删除权限失败，状态码为：' + res.meta.status)
      role.children = res.data
      this.$message.success('删除权限成功！')
    },
    // 展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200)
        return this.$message.error(
          '加载权限列表失败，状态码为：' + res.meta.status
        )
      // 把获取到的权限数据保存到data中
      this.rightsList = res.data
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightsDialogClosed(){
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights(){
      const keys = [...this.$refs.treeRef.getCheckedKeys(),...this.$refs.treeRef.getHalfCheckedKeys()]
      const idstr = keys.join(',')
      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idstr})
      if(res.meta.status !== 200) return this.$message.error('分配权限失败，状态码为：'+res.meta.status)
      this.setRightDialogVisible = false
      this.getRolesList()
      this.$message.success('分配权限成功！')
    }
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>